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(Article of periodic en Anglais - 2014)

Document title

Tree root mounds and their role in transporting soil on forested landscapes

Authors(s) and Affiliation(s)

HOFFMAN B.S.S. (1) ; ANDERSON R.S. (1 2) ;
(1) Inst. of Arctic and Alpine Research (INSTAAR), Univ. of Colorado, Boulder, ETATS-UNIS
(2) Dep. of Geological Sciences, Univ. Colorado, Boulder, ETATS-UNIS

Abstract

The growth and decay of tree roots can stir and transport soil. Therefore, the AA. document the mounding of soil beside Ponderosa and Lodgepole pine trees in the forests of Colorado's Boulder Creek watershed. Positive mounding occurs on all sides of trees on slopes, indicating that the mounding is not attributable to deflection of a creeping flow of soil around the tree, but rather to the insertion of root volume on all sides in the subsurface. Mounding is commonly asymmetric even on cross-slope profiles. Significant variation in the mound sizes results in no clear relationship between tree diameter and root volume displaced. These observations motivated the development of a discrete element model of tree root growth using the LIGGGHTS model. Finally, the AA. develop a previous analysis of the role of roots in transporting soil during growth and decay cycles. They find that even in shallow soils, the root-cycle can drive significant soil transport down forested montane slopes

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no6 [pp. 711-722]

Bibliographic references : 1 p.

Collation : 17 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3470

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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